Basic Overview of ET200 SP HA

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The high-performance I/O system SIMATIC ET 200SP HA – perfectly matched to the requirements of the process industry and with clear advantages wherever ruggedness and maximum availability are important in the process and manufacturing industry. Benefits Availability: Redundancy at the PROFINET interface (S2 or R1) Hot swapping during runtime station expansion possible during runtime Easy to Use: Compact modules with permanent wiring. One terminal block for all 24 V standard signals Tool-free connection system with push-in-terminals Compact Design Compact with up to 56 i/o modules per station High concentration of up to 32 channels on a module that is only 22.5 mm wide System-integrated power bus Seamless integration in SIMATIC PCS new PROFINET IO communication standard Functions Main functions Compact I/O modules Up to 32 channels on a module that is 22.5 mm wide Up to 56 modules per station Perfectly suited for applications in the field Installation up to hazardous zone 2 Extended temp
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Important Properties of Internal Tag in Wincc

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Below is the important properties of Tags in Wincc. 


1. Linear Scaling: Basically when you want to scale values from PLC in Wincc then we use. eg: value from PLC is 0 to 1000 and we have to show 0 to 100 in wincc.

2. Limit Values: If we want to limit the display of values.  We can use substitute values if requires to display when it reaches at limit.

Main important properties to note:

a. Substitute value on connection error: We can use it show for connection error. Sometime for the 
    user becomes difficult to understand that it is communication error or parameter error.

b. Runtime persistence: It can be used to save last value of internal tag before shutdown of wincc projects.

c. Synchronization: It is required when we are using server redundancy and project has internal tags use. If it is not selected than both redundant server may show different values even they are synchronized.




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